<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>超时与网络异常</title>
  <style>
    #result {
      width: 200px;
      height: 200px;
      border: 1px solid palegoldenrod;
    }
  </style>
</head>

<body>
  <button>点击发送请求</button>
  <div id="result"></div>
  <script src="./5-超时与网络异常.js"></script>
</body>

</html>